You "thought" the job would be more than it is.  Was there a job description, were duties outlined?  I think your take away would be you are wiser now.  When looking down the road at the next great job, get specific details about the position, are they willing to hear improvement ideas from the admins, and how receiptive would your new boss be to your suggestions.

I think the other poster jumped to conclusions I would not make the assumption that your boss wants to keep you in his limited design cubicle.  In everything is a time and a place.  At the time you suggested the item he may not have been willing to move forward.  The manager clicked the right time and place for the idea and was able to get your boss to move forward.  What did the manager do different from what you did? It must have been something as he was successful - sorry that sounded very harsh.  If you want to stay in this position, I wouldn't just sit back, I would continue to promote my ideas - your boss would be less than intelligent not to take advantage of your skills.  He may just need a little adjustment time - manage the manager so to speak.  I'm confident you will find the right tack!

Side bar: In my world my bosses are very willing to come to me with their lack of IT knowledge.  I get documents all the time to fix this or that, or called in to their office to change settings.  They won't waste time floundering around.